<!doctype html>
<html>
	<head>
		<title>登录</title>
		<meta charset="utf-8">
		<link rel="stylesheet" type="text/css" href="css.css">
	</head>
	
	<body>
		<div class=a>
		<form action="#" method="post">
			<table>
				<tr>
				<p>
					<td><span>账号:</span></td>
					<td><input type="text" name="usename" value="admin" class="num" pattern="^[a-zA-Z][a-zA-Z0-9_]{4,18}$"/>(请输入账号)</td>
				</p>
				</tr>
				<tr>
				<P>
					<td><span>密码:</span></td>
					<td><input type="password" name="pwd" class="pass" pattern="^[a-zA-Z][a-zA-Z0-9_]{1-18}$"/>(请输入密码)</td>
				</P>
				</tr>
				<tr>
				<p>
					<td align="center"><input type="button" class="btn01" value="登录"/>
					<input type="reset" value="重置"></td>
				</p>
				</tr>
			</table>
		</form>
		</div>
	</body>
</html>